Rockwell Automation 1746-HSCE,D17466.5 High-Speed Counter Module - Manual (Page 112)

Publication 1746-UM006B-EN-P - August 2005
5-6 Start-Up, Operation, and Troubleshooting
Output Does Not Come On
Make sure SLC processor is in run mode.
Check the associated module LED for the output.
•
If the LED is illuminated check the power supply and its
connections to the module. Also check the connections to the
output device.
•
If the LED is not illuminated make sure the SLC processor is in
run mode and that a module fault has not occurred. Check the
Output Status field of the input image (I:e.4/8-15) to see if the
module is trying to energize the output. If not, make sure the
Function Control bit (M0:e.1/12) and Enable Output bit
(M0:e.1/1) are set to 1.
•
Make sure the Output Selection field (M0:e.0/0-7) is properly
set up.
•
Check the number of outputs scanned if the advanced setup
is set to 1.
Output Does Not Turn Off
Check the associated module LED for the output.
•
If the LED is illuminated, check your program operation.
•
If the LED is not illuminated, check the wiring to your output
device. Check the leakage current of your connected device (for
more information, refer to Appendix A).
Module Count will not Reset
•
Check the reset mode.
•
Check I:e. 1/12 reset input mode bit is on when conditions are
met.
•
If using the z-pulse, check the phasing of the encoder. Marker
(z-pulse) must be high and the A and B signals must be low.
The phasing must match the timing diagrams on pages 3-11,
3-12, 3-13.